> > We have a number of clients where we are upgrading their server from
> > 2.0 to 2.1.
> >
> > Is it OK to leave the client workstations (minimal Firebird install)
> on
> > version 2.0 when changing the server to 2.1?
>
> I would suggest that you update all of the clients to v2.1, to allow
> the
> clients to take advantage of the protocol performance improvements made
> in v2.1.
>
> The v2.1 client is backward compatible with all previous/older servers.
>
>
> Sean

and just make sure you distribute the vcrt dlls (there's a separate msi).
I have found some workstations require it and some don't don't but if you
distribute it, it won't cause you any head scratching. If the workstation
doesn't have it (or something else), you get a message "Firebird client not
installed".
Alan